/* ================= 基础重置与变量 ================= */
        :root {
            --primary-color: #2563eb; /* 信任蓝 */
            --primary-hover: #1d4ed8;
            --secondary-color: #f59e0b; /* 转化橙 */
            --secondary-hover: #d97706;
            --text-main: #1f2937;
            --text-light: #4b5563;
            --bg-light: #f8fafc;
            --bg-white: #ffffff;
            --border-color: #e2e8f0;
            --wechat-green: #07c160;
            --price-color: #ef4444; /* 价格红 */
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            scroll-behavior: smooth;
        }

        body {
            color: var(--text-main);
            line-height: 1.6;
            background-color: var(--bg-white);
           
        }

        a { text-decoration: none; color: inherit; }
        ul { list-style: none; }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 按钮样式 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 8px;
            font-weight: bold;
            text-align: center;
            cursor: pointer;
            transition: all 0.3s ease;
            border: none;
            font-size: 16px;
        }
        
        .btn-primary {
            background-color: var(--secondary-color);
            color: white;
            box-shadow: 0 4px 12px rgba(245, 158, 11, 0.4);
        }
        
        .btn-primary:hover {
            background-color: var(--secondary-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(245, 158, 11, 0.5);
        }

        .btn-outline {
            background-color: transparent;
            color: white;
            border: 2px solid white;
        }

        .btn-outline:hover {
            background-color: rgba(255,255,255,0.15);
        }

        /* 标题统一样式 */
        .section-title {
            text-align: center;
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 16px;
            color: var(--text-main);
            letter-spacing: 1px;
        }
        
        .section-subtitle {
            text-align: center;
            font-size: 16px;
            color: var(--text-light);
            margin-bottom: 50px;
        }

        .section-title span {
            color: var(--primary-color);
        }

        /* ================= 0. 顶部导航栏 ================= */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
            z-index: 1000;
            padding: 15px 0;
            transition: all 0.3s;
        }

        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 20px;
            font-weight: 800;
            color: var(--primary-color);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-links {
            display: flex;
            gap: 50px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-light);
        }

        .nav-links a:hover {
            color: var(--primary-color);
        }

        .nav-btn {
            background: var(--primary-color);
            color: white !important;
            padding: 8px 20px;
            border-radius: 6px;
            font-size: 14px;
            transition: all 0.2s;
        }

        .nav-btn:hover {
            background: var(--primary-hover);
        }

        /* ================= 1. 首屏区域 (Hero) ================= */
        .hero {
            background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
            color: white;
            padding: 140px 0 80px;
            text-align: center;
            position: relative;
        }

        .hero h1 {
            font-size: 42px;
            margin-bottom: 24px;
            line-height: 1.3;
            font-weight: 800;
            letter-spacing: 1px;
        }

        .hero p {
            font-size: 18px;
            margin-bottom: 40px;
            opacity: 0.9;
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero-btns {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-bottom: 60px;
        }

        .hero-features {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 30px;
            font-size: 16px;
            background: rgba(255,255,255,0.1);
            padding: 20px 30px;
            border-radius: 12px;
            max-width: 900px;
            margin: 0 auto;
            backdrop-filter: blur(10px);
        }

        .hero-features span {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .hero-features i {
            color: #fbbf24;
        }

        /* ================= 2. 服务项目 (Services) - 适配截图1 ================= */
        .services {
            padding: 80px 0;
            background-color: var(--bg-white);
        }

        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
        }

        .service-card {
            background: var(--bg-white);
            padding: 40px 30px;
            border-radius: 12px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.04);
            transition: all 0.3s ease;
            border: 1px solid var(--border-color);
            position: relative;
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }

        /* 顶部的蓝色横线（悬浮出现） */
        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: var(--primary-color);
            transform: scaleX(0);
            transition: transform 0.3s ease;
            transform-origin: left;
        }

        .service-card:hover::before {
            transform: scaleX(1);
        }

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 30px rgba(0,0,0,0.08);
        }

        .service-icon {
            font-size: 36px;
            color: var(--primary-color);
            margin-bottom: 20px;
        }

        .service-card h3 {
            font-size: 22px;
            margin-bottom: 15px;
            color: var(--text-main);
            font-weight: 700;
        }

        .service-card p {
            color: var(--text-light);
            font-size: 15px;
            margin-bottom: 20px;
            line-height: 1.7;
            flex-grow: 1;
        }

        .service-card .target-audience {
            font-size: 13px;
            color: var(--primary-color);
            background: #eff6ff;
            padding: 10px 15px;
            border-radius: 8px;
            display: inline-block;
            font-weight: 500;
        }

        /* ================= 3. 备案材料清单 - 适配截图2 ================= */
        .materials {
            padding: 80px 0;
             
        }

        .materials-box {
            max-width: 1200px;
            margin: 0 auto;
            background: var(--bg-white);
            padding: 50px;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            box-shadow: 0 10px 30px rgba(0,0,0,0.03);
        }

        .materials-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }

        .materials-col h3 {
            font-size: 22px;
            color: var(--primary-color);
            display: flex;
            align-items: center;
            gap: 12px;
            padding-bottom: 20px;
            border-bottom: 1px solid var(--border-color);
            margin-bottom: 25px;
        }

        .materials-col ul li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            margin-bottom: 18px;
            color: var(--text-light);
            font-size: 16px;
            line-height: 1.5;
        }

        .materials-col ul li i {
            color: var(--wechat-green); /* 绿色对勾 */
            margin-top: 5px;
            font-size: 16px;
        }

        /* ================= 4. 代办流程 - 适配截图3 ================= */
        .process {
            padding: 80px 0;
            background-color: #f8fafc;
            overflow: hidden;
        }

        .process-steps {
            display: flex;
            justify-content: space-between;
            position: relative;
            max-width: 1200px;
            margin: 0 auto;
        }

        /* 横线连接 */
        .process-steps::before {
            content: '';
            position: absolute;
            top: 25px;
            left: 8%;
            width: 84%;
            height: 1px;
            background: #e2e8f0;
            z-index: 1;
        }

        .step {
            flex: 1;
            text-align: center;
            position: relative;
            z-index: 2;
            padding: 0 10px;
        }

        .step-number {
            width: 50px;
            height: 50px;
            background-color: var(--bg-white);
            color: var(--primary-color);
            border: 2px solid var(--primary-color);
            border-radius: 50%;
            display: flex;
            justify-content: center;
            align-items: center;
            font-size: 22px;
            font-weight: bold;
            margin: 0 auto 25px;
            transition: all 0.3s;
        }

        .step:hover .step-number {
            background-color: var(--primary-color);
            color: white;
            transform: scale(1.1);
        }

        .step h4 {
            font-size: 18px;
            margin-bottom: 12px;
            color: var(--text-main);
        }

        .step p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
        }

        /* ================= 5. 常见问题 (FAQ 两列展开式) ================= */
        .faq {
            padding: 80px 0;
            
        }

        .faq-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 25px;
            align-items: start;
        }

        .faq-item {
            background: var(--bg-white);
            padding: 30px;
            border-radius: 12px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.03);
            border: 1px solid var(--border-color);
            transition: all 0.3s;
            height: 100%;
        }

        .faq-item:hover {
            box-shadow: 0 8px 24px rgba(0,0,0,0.08);
            border-color: var(--primary-color);
            transform: translateY(-3px);
        }

        .faq-question {
            font-weight: 700;
            font-size: 18px;
            margin-bottom: 15px;
            color: var(--primary-color);
            display: flex;
            align-items: flex-start;
            gap: 12px;
        }

        .faq-question i {
            margin-top: 5px;
            font-size: 16px;
            color: var(--secondary-color);
        }

        .faq-answer {
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.8;
        }

        .highlight {
            color: var(--secondary-color);
            font-weight: bold;
        }

        /* ================= 6. 页脚 (Footer) ================= */
        footer {
            background-color: #111827;
            color: #9ca3af;
            padding: 40px 0 20px;
            font-size: 14px;
        }

        .footer-content {
            display: grid;
            grid-template-columns: 1fr;
            gap: 40px;
            margin-bottom: 40px;
            text-align: center;
        }

        .footer-col h4 {
            color: white;
            font-size: 18px;
            /* margin-bottom: 25px; */
            position: relative;
            padding-bottom: 10px;
        }

        .footer-col h4::after {
            /* content: ''; */
            position: absolute;
            bottom: 0;
            /* left: 0; */
            width: 30px;
            height: 2px;
            background: var(--primary-color);
        }

        .footer-col p {
            margin-bottom: 12px;
            line-height: 1.8;
        }

        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            flex-direction: column;
        }

        .footer-links a {
            background: #1f2937;
            padding: 6px 12px;
            border-radius: 4px;
            font-size: 13px;
            transition: all 0.2s;
        }
        
        .footer-links a:hover {
            background: var(--primary-color);
            color: white;
        }

        /* 联系信息块 */
        .contact-info p {
            /* display: flex; */
            align-items: center;
            gap: 10px;
            font-size: 15px;
        }
        
        .contact-info i {
            color: var(--primary-color);
            width: 20px;
            text-align: center;
        }

        /* 微信二维码 */
        .qrcode-box {
            background: white;
            padding: 10px;
            border-radius: 8px;
            display: inline-block;
            text-align: center;
            margin-top: 10px;
        }
        
        .qrcode-box img {
            width: 130px;
            height: 130px;
            object-fit: cover;
            border: 1px solid #eee;
        }
        
        .qrcode-box p {
            color: #333;
            font-size: 14px;
            /* margin-top: 5px; */
            margin-bottom: 0;
            font-weight: bold;
            text-align: center;
        }

        .copyright {
            text-align: center;
            border-top: 1px solid #374151;
            padding-top: 20px;
            font-size: 13px;
        }

        /* ================= 7. 悬浮联系栏与底部固定栏 ================= */
        /* 电脑端右侧悬浮栏 (带电话、微信和返回顶部) */
        .sticky-sidebar {
            position: fixed;
            right: 20px;
            top: 50%;
            transform: translateY(-50%);
            background: white;
            border-radius: 12px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.1);
            padding: 15px 10px;
            display: flex;
            flex-direction: column;
            gap: 15px;
            z-index: 999;
            align-items: center;
            width: 100px;
            border: 1px solid var(--border-color);
        }
        
        .sticky-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            color: var(--text-light);
            cursor: pointer;
            transition: color 0.2s;
            font-size: 12px;
            text-align: center;
            width: 100%;
            padding: 10px 0;
            border-bottom: 1px solid #f1f5f9;
        }
        
        .sticky-item:last-child {
            border-bottom: none;
        }
        
        .sticky-item i {
            font-size: 22px;
            margin-bottom: 6px;
            color: var(--primary-color);
        }
        
        .sticky-item:hover {
            color: var(--primary-color);
        }

        .sticky-item.wechat-item i {
            color: var(--wechat-green);
        }

        .sticky-item .info-text {
            font-weight: bold;
            color: var(--text-main);
            font-size: 13px;
            margin-top: 3px;
        }

        .sticky-item.back-top i {
            color: var(--text-main);
        }

        /* 手机端底部固定栏 */
        .mobile-bottom-bar {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            width: 100%;
            background: white;
            box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
            z-index: 1000;
        }

        .mobile-bar-item {
            flex: 1;
            text-align: center;
            padding: 12px 0;
            color: var(--text-light);
            font-size: 14px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 4px;
        }
        
        .mobile-bar-item i {
            font-size: 20px;
        }

        .mobile-bar-item.phone {
            background: var(--primary-color);
            color: white;
        }

        .mobile-bar-item.wechat {
            background: var(--wechat-green);
            color: white;
        }
 /* ================= 2. 收费标准 (Pricing) ================= */
        .pricing {
            padding: 80px 0;
            background-color: var(--bg-light);
        }
   
        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            max-width: 1200px;
            margin: 0 auto;
        }

        .pricing-card {
            background: white;
            border-radius: 12px;
            padding: 40px 20px;
            text-align: center;
            border: 1px solid var(--border-color);
            transition: all 0.3s ease;
            position: relative;
        }

        .pricing-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 24px rgba(0,0,0,0.08);
            border-color: var(--primary-color);
        }

        .pricing-card.popular {
            border: 2px solid var(--secondary-color);
            box-shadow: 0 8px 20px rgba(245, 158, 11, 0.15);
        }

        .popular-tag {
            position: absolute;
            top: -12px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--secondary-color);
            color: white;
            padding: 4px 15px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: bold;
        }

        .pricing-card h3 {
            font-size: 20px;
            margin-bottom: 10px;
            color: var(--text-main);
        }

        .pricing-desc {
            font-size: 14px;
            color: var(--text-light);
            margin-bottom: 25px;
        }

        .price-wrap {
            margin-bottom: 25px;
        }
        
        .price-wrap .currency {
            font-size: 18px;
            color: var(--price-color);
            font-weight: bold;
        }

        .price-wrap .amount {
            font-size: 48px;
            font-weight: 800;
            color: var(--price-color);
            line-height: 1;
        }

        .price-wrap .unit {
            font-size: 14px;
            color: var(--text-light);
        }

        .pricing-features {
            margin-bottom: 30px;
            text-align: left;
            padding-left: 20px;
        }

        .pricing-features li {
            font-size: 14px;
            margin-bottom: 12px;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .pricing-features li i {
            color: var(--wechat-green);
        }

        /* ================= 响应式适配 (手机端) ================= */
        @media (max-width: 992px) {
            .footer-content { grid-template-columns: 1fr 1fr; }
            .nav-links { display: none; }
            .materials-grid { grid-template-columns: 1fr; gap: 30px; }
        }

        @media (max-width: 768px) {
            .hero { padding: 120px 0 40px; }
            .hero h1 { font-size: 28px; }
            .hero p { font-size: 16px; }
            .hero-btns { flex-direction: column; padding: 0 20px; }
            .hero-btns .btn { width: 100%; }
            .hero-features { flex-direction: column; align-items: flex-start; gap: 15px; padding: 20px; margin: 0 20px; }
            
            .section-title { font-size: 24px; }
            .services, .faq, .process, .materials { padding: 50px 0; }
            
            .materials-box { padding: 25px; }
            
            /* FAQ 改为单列 */
            .faq-grid { grid-template-columns: 1fr; }
            
            .footer-content { grid-template-columns: 1fr; gap: 30px; }
            
            /* 隐藏电脑端悬浮栏，显示手机端底部栏 */
            .sticky-sidebar { display: none; }
            .mobile-bottom-bar { display: flex; }
            
            /* 流程步骤手机端改为纵向 */
            .process-steps { flex-direction: column; gap: 40px; }
            .process-steps::before { display: none; }
            .step { width: 100%; }
            .step-number { margin: 0 auto 15px; }
        }
		@media (max-width: 992px) {
            .pricing-grid { grid-template-columns: repeat(1, 1fr); }
            .footer-content {/* grid-template-columns: 1fr 1fr; */}
            .nav-links { display: none; } /* 手机端隐藏导航链接，保留按钮 */
        }